A casino is a gambling establishment where patrons can gamble on games of chance. Most casinos offer a wide variety of games such as blackjack, roulette, slots, craps, baccarat and poker. In addition, many of them offer live entertainment and other amenities such as restaurants, bars, hotels and theatres.
In the early 21st century, casino development accelerated. Several states changed their laws to allow more casinos. Nevada has the largest concentration of casinos, followed by Atlantic City and New Jersey. Native American casinos also have become increasingly popular.
Casinos make money by giving out complimentary goods or services to players, referred to as comps. These may include free hotel rooms, meals, show tickets and limo service. In addition, the casinos earn money from the players through a small percentage of their wagers called vig or rake. This enables the casino to have built in statistical advantages over the players, which is known as the house edge.
Because of the large amounts of cash handled by casino staff and patrons, security is an important concern. In addition to visible surveillance cameras, most casinos employ a variety of sophisticated security measures. These technologies include chips with microcircuitry that enable a casino to oversee the exact amount of bets placed minute-by-minute, and electronic monitoring of roulette wheels to discover any deviation from their expected results.
Something about gambling seems to encourage people to cheat or steal, either in collusion with each other or independently. For this reason, casinos spend a large amount of time and effort on security.